Frank k



(No Model.)

P. K. HESSE.

VETERINARY FILE.

Patented'June-w, 1891.

Uwrrnn STATES ATENT FFICE.

FRANK K. llESSE, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO CODMAN &SHURTLEFF, OF SAME PLACE.

VETERINARY FILE.

SPECIFICATION forming part of Letters Patent No. 454,436, dated June 16,1891.

Application filed January 17, 1891. Serial No1378,064. (No model.)

To all whom it may concern:

Be it known that I, FRANK K. HEssE, of Boston, county of Suffolk, Stateof Massachusetts, have invented an Improvement in Horse Tooth-Files, ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like letters and figures on the drawingsrepresenting like parts.

IO This invention has for its object to improve the construction ofhorses teeth-files or mouthrasps; and my invention. consists in detailsof construction, to be hereinafter pointed out, and claimed at the endof this specification.

Figure 1 shows a longitudinal section of a horse tooth-file embodyingthis invention; Fig. 2, a detail of the handle to be referred to 5 Fig..3, a perspective View of the file and its holder; Fig. 4, a detail of alocking device to be referred to.

The handle a is attached to a shank portion a, to which is secured athreaded projection a having a screw-driver blade (i said screw-threadedprojection a entering an in- 2 5 ternally-screw-threaded socket formedin a shank portion a which latter is formed at its end with a flatbroadened base I), substantially rectangular in shape and having at eachside a vertical lip b b, and having at one end 0 an inwardly turned lipN, which is depressed below the surface of the file c. The file c ismade wide enough to fit snugly between the vertical lips b b, and saidfile is beveled at each end on both faces to present a beveled 3 5 sideor face, irrespective of which face of the file is exposed. One of thebeveled ends enters beneath the inwardly-turned lip 11 and the other endenters beneath an ofiset or projecting lip d of a locking device orplate (1,

which is shown in detail, Fig. 4., said lockingplate (1 having a holethrough it for a screw 2, preferably made of non-rusting material, whichpasses into an internally-sorew-threaded hole formed in the base Z),said screw 2 securing the locking device (7/ in place. The

plate (1' is made of suitable width to enter between and be guided bythe vertical lips I) b. The shank portion adjacent to the baseh has agroove 6, which serves a guideway of the locking device or plate (7,, aprojection e on said locking device entering the said groove 6, suchgroove and projection, together with the vertical lips I) b, preventingthe locking device or plate from turning on the screw or getting out ofline. One side of the file may be cut as a rasp or may be made finerthan the other, and it may be turned over at will to utilize either sideof it. The file may be also readily removed, and as the beveled lipswhich hold the file in place are depressed below the surface of the filethey will not act to injure the animal.

By providing the screw-driver blade a as shown it may be employed toturn the screw 2 as desired, and being formed as an attachment to anindestructible part of the instrument it can never be lost or mislaid,as might be the case with a separate screw-driver.

I do notdesire to limit myinvention to the lips at the ends of the basebeing inturned, as by applying considerable pressure to the screw thefile may be held in place even if said lips were not inturned. Bybeveling the ends of the file and also beveling the lips externally alldanger of wounding either the soft parts of the mouth or engaging toodeeply in the teeth. is avoided. The vertical side lips b extendingabove the surface of the file, act as guides to keep the file in contactwith the teeth, and also as shields or guards to protectthe inner partsof the cheeks and tongue of the animal when the file or rasp is drawn orpushed in contact with the grinding-surfaces of the teeth.

I do not desire to limit myself to the particu- S 5 lar constructionherein shown for preventing the locking-plate from turning.

1. In a horse tooth-file, the handle and shank or equivalent, the base12, having the lip at its 0 outer end, and vertical lips, as Z), at eachside to receive and hold the file, combined with a removable lockingdevice at the heel end of the file, consisting of a plate of suitablewidth to enter between and be guided by said ver- 5 tical lips Z),substantially as described.

2. In a horse tooth-file, the handle and shank or equivalent, and thebase I), having the guideway e, combined with the file, the inturned lipb at one end, and the locking de- Ioo vice d at the other end having theprojeccombined with a two-part shank a a, and a tion 6' following insaid guideway, substanscrew-threaded screw-driver socket in the p01-tially as described. 7 tion a substantially as described.

3. Inahorse t00th-fi1e,thehand1e andshank In testimony whereof I havesigned my 5 or equivalent, and'the base I), combined with name to thisspecification in the presence of 15 the file beveled at its ends, theinturned lip Z) two subscribing witnesses. at one end, and the removablelocking device FRANK K. HESSE. cl at the other end, substantially asdescribed. \Vitnesses:

4. In a horse tooth-file, the file and holder BERNIoE J. NQYEs, 10 forit and the lockingdevice for said file, EDWARD F. ALLEN.

